Magnet coil cores, demagnetization power and Lenz delay.

[MarkE]

You're just completely full of shit!

Take any ferrite used for EMI control such as a 4C65 right out of the Ferroxcube catalog that you linked.  The volume resistivity is about 10MegOhm * Meters.  A half inch square cross section one inch long is:  1E7 * 1 / ( (0.5*0.0254)²) or ~62G Ohms.  Power ferrites like a 3C94 have much lower volume resistivities.  3C80 material is listed around 4Ohm * Meters.  The same 0.5" square by 1" long piece would be in the 24K Ohm range.

[synchro1]

@MarkE,

Here it is translated from Mandrian Chinese:


In general, resistivity of intrinsic semiconductors decreases with increasing temperature.

[synchro1]

Increasing magnetic flux density in the ferrite by fastening magnets to it causes One: Magnostriction. The material will shrink because the electron orbits align. Two: Adiabatic cooling and Three: Increased resestivity. So the Ohmic resistance will rise with the addition of the magnets. Contrary to what MarkE said, any DMM With a good battery and Ohms detector will work!

The important relationship here is between the increase in Ohmic resistance and the delay in the re-polarization of the ferrite. The higher the Ohms, the greater the DLE.

[synchro1]

That solves the positioner problem. All we need to do now is to wire the Ohms detector electrodes from the ferrite core to the 731 Op Amp  to raise and lower the pivot sheer magnet adjustor at the back of the core.

[MarkE]

@MarkE,

Here it is translated from Mandrian Chinese:


In general, resistivity of intrinsic semiconductors decreases with increasing temperature.

And the context for this nonsequitur is?